JP2012233127A - クロロプレンゴム、クロロプレンゴム組成物及びその加硫物並びに成形体 - Google Patents
クロロプレンゴム、クロロプレンゴム組成物及びその加硫物並びに成形体 Download PDFInfo
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- JP2012233127A JP2012233127A JP2011104105A JP2011104105A JP2012233127A JP 2012233127 A JP2012233127 A JP 2012233127A JP 2011104105 A JP2011104105 A JP 2011104105A JP 2011104105 A JP2011104105 A JP 2011104105A JP 2012233127 A JP2012233127 A JP 2012233127A
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- Prior art keywords
- diene
- chloroprene rubber
- chlorobuta
- chloroprene
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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Abstract
【解決手段】ap配座型trans−1−クロロブタ−1,3−ジエン及びcis−1−クロロブタ−1,3−ジエンを合計で0.5質量%以上、2,3−ジクロロブタ−1,3−ジエンを2.0質量%以上含有し、残部がクロロプレンである原料モノマーを、乳化重合してクロロプレンゴムを得る。そして、そのクロロプレンを含有する組成物を加硫して、成形体とする。
【選択図】なし
Description
本発明においては、原料モノマーが、ap配座型trans−1−クロロブタ−1,3−ジエン、cis−1−クロロブタ−1,3−ジエン及び2,3−ジクロロブタ−1,3−ジエンを、特定量含有しているため、低温特性が安定する。
また、本発明に係る加硫物は、前述したクロロプレンゴム組成物を加硫したものである。
更に、本発明に係る成形体は、前述したクロロプレンゴム組成物を、成形後又は成形時に加硫したものであり、例えば、ブーツ部品、ホース部品、支承ゴム、シール材又はワイパーブレードなどである。
先ず、本発明の第1の実施形態に係るクロロプレンゴムについて説明する。本実施形態のクロロプレンゴムは、ap配座型trans−1−クロロブタ−1,3−ジエン及びcis−1−クロロブタ−1,3−ジエンを合計で0.5質量%以上含有すると共に、2,3−ジクロロブタ−1,3−ジエンを2.0質量%以上含有する原料モノマーを乳化重合することにより得られる。
下記化学式1に示すap配座型trans−1−クロロブタ−1,3−ジエン、及び下記化学式2に示すcis−1−クロロブタ−1,3−ジエンは、例えばアセチレン法によりクロロプレンを製造する際に副生成物として得られる。そして、クロロプレンと共に重合すると、加硫後の低温特性が向上する。
2,3−ジクロロブタ−1,3−ジエンは、クロロプレンゴムの結晶性を不規則化させ、加硫後の低温特性を向上させる効果がある。しかしながら、その含有量がモノマー全量あたり2.0質量%未満の場合、十分な改善効果が得られない。そこで、本実施形態のクロロプレンゴムでは、原料モノマー中の2,3−ジクロロブタ−1,3−ジエン含有量を2.0質量%以上としている。
次に、本実施形態のクロロプレンゴムの製造方法について説明する。本実施形態のクロロプレンゴムの製造方法では、クロロプレンを主成分とする原料モノマーを、乳化重合する。その際、原料モノマーのap配座型trans−1−クロロブタ−1,3−ジエン及びcis−1−クロロブタ−1,3−ジエン含有量を合計で0.5質量%以上とし、2,3−ジクロロブタ−1,3−ジエン含有量を2.0質量%以上とする。
次に、本発明の第2の実施形態に係るクロロプレンゴム組成物について説明する。本実施形態のクロロプレンゴム組成物は、前述したクロロプレンゴムに、加硫剤、加硫促進剤、充填剤、補強剤、軟化剤、可塑剤、滑剤、滑剤、老化防止剤、安定剤、シランカップリング剤及び受酸剤などを配合したものである。
次に、本発明の第3の実施形態に係る成形体について説明する。本実施形態の成形体は、前述した第1の実施形態のクロロプレンゴム組成物を、成形後又は成形と同時に加硫して得たものである。成形体の具体例としては、例えば等速ジョイントブーツ、ボールジョイントブーツ、ラック&ピニオンブーツなどのブーツ部品、オイルホース、フューエルベーパーホース、エアホース、ターボチャージャーホース、パワーステアリングホース、ブレーキホース、エアコンホース、高圧ホースなどのホース部品、エンジンマウント防振ゴム、マフラーハンガー、支承ゴム、空気ばね、オイルシールやOリングなどのシール材、及びワイパーブレードなどが挙げられる。
JIS K 6250に基づいてテストピースを作製し(加硫条件:141℃×25分間)、JIS K 6253に基づいて、各加硫物(加硫ゴム)の硬度測定を行った。
上記表2に示す組成の各クロロプレンゴム組成物について、JIS−K 6300に基づいて、125℃におけるスコーチタイムを測定した。
JIS K 6250に基づいてテストピースを作製し(加硫条件:141℃×25分間)、JIS K 6253に基づいて引張試験を行い、各加硫物(加硫ゴム)の強度及び伸びを測定した。
上記表2に示す組成の各クロロプレンゴム組成物を、141℃で35分間加硫したものについて、JIS K 6262に基づいて、0℃の温度条件下で70時間試験したときの圧縮永久歪を測定した。
上記表3に示す組成の各ポリクロロプレンゴム組成物を、141℃で25分間加硫したものについて、JIS K 6261に基づいて、ゲーマンねじり試験を実施した。そして、常温における180°ねじりモジュラスの10倍になる温度(T10)を求め、この値により各ポリクロロプレンゴム組成物の低温特性を評価した。
本発明においては、原料モノマーが、ap配座型trans−1−クロロブタ−1,3−ジエン、cis−1−クロロブタ−1,3−ジエン及び2,3−ジクロロブタ−1,3−ジエンを、特定量含有しているため、低温特性が安定する。
次に、本発明の第2の実施形態に係るクロロプレンゴム組成物について説明する。本実施形態のクロロプレンゴム組成物は、前述したクロロプレンゴムに、加硫剤、加硫促進剤、充填剤、補強剤、軟化剤、可塑剤、滑剤、老化防止剤、安定剤、シランカップリング剤及び受酸剤などを配合したものである。
上記表2に示す組成の各クロロプレンゴム組成物について、JIS K 6300に基づいて、125℃におけるスコーチタイムを測定した。
Claims (6)
- ap配座型trans−1−クロロブタ−1,3−ジエン及びcis−1−クロロブタ−1,3−ジエン:合計で0.5質量%以上と、
2,3−ジクロロブタ−1,3−ジエン:2.0質量%以上と
を含有する原料モノマーを乳化重合して得たクロロプレンゴム。 - 請求項1に記載のクロロプレンゴムを含むクロロプレンゴム組成物。
- 請求項2に記載のクロロプレンゴム組成物を加硫した加硫物。
- 請求項2に記載のクロロプレンゴム組成物を、成形後又は成形時に加硫して得た成形体。
- ブーツ部品、ホース部品、支承ゴム、シール材又はワイパーブレードであることを特徴とする請求項4に記載の成形体。
- ap配座型trans−1−クロロブタ−1,3−ジエン及びcis−1−クロロブタ−1,3−ジエンを合計で0.5質量%以上含有すると共に、2,3−ジクロロブタ−1,3−ジエンを2.0質量%以上含有する原料モノマーを、乳化重合するクロロプレンゴムの製造方法。
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JP2011104105A JP5250659B2 (ja) | 2011-05-09 | 2011-05-09 | クロロプレンゴム、クロロプレンゴム組成物及びその加硫物並びに成形体 |
US14/114,899 US8816030B2 (en) | 2011-05-09 | 2012-02-07 | Chloroprene rubber, chloroprene rubber composition, vulcanizate thereof, and formed body |
RU2013154447A RU2612939C2 (ru) | 2011-05-09 | 2012-02-07 | Хлоропреновый каучук, композиция хлоропренового каучука, его вулканизат и формованное изделие |
DE112012002035.9T DE112012002035T5 (de) | 2011-05-09 | 2012-02-07 | Chloroprenkautschuk, eine Chloroprenkautschukzusammensetzung, ein Vulkanisat davon und Formkörper |
PCT/JP2012/052730 WO2012153551A1 (ja) | 2011-05-09 | 2012-02-07 | クロロプレンゴム、クロロプレンゴム組成物及びその加硫物並びに成形体 |
CN201280022489.1A CN103517927B (zh) | 2011-05-09 | 2012-02-07 | 氯丁二烯橡胶、氯丁二烯橡胶组合物及其硫化物以及成型体 |
TW101104513A TWI537326B (zh) | 2011-05-09 | 2012-02-13 | 氯丁二烯橡膠、氯丁二烯橡膠組成物及其硫化物以及成形體 |
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DE112012002035T5 (de) | 2014-03-27 |
US8816030B2 (en) | 2014-08-26 |
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